Improve usage of std::move and const references parameters

Accomplished using `run-clang-tidy` with `performance-move-const-arg,performance-unnecessary-value-param,modernize-pass-by-value`.

Changed arguments to const references, removed them where inappropriate (e.g. sink parameters). Same with std::move.

Manually reviewed each change to make sure that it makes sense, and do something more appropriate if possible.

Source/Core/DolphinQt/Debugger/GekkoSyntaxHighlight.cpp

@@ -5,6 +5,8 @@
 
 #include "Common/Assembler/GekkoParser.h"
 
+#include <utility>
+
 #include <QLabel>
 #include <QPalette>
 
@@ -189,7 +191,7 @@ void GekkoSyntaxHighlight::highlightBlock(const QString& text)
 
 GekkoSyntaxHighlight::GekkoSyntaxHighlight(QTextDocument* document, QTextCharFormat base_format,
                                            bool dark_scheme)
-    : QSyntaxHighlighter(document), m_base_format(base_format)
+    : QSyntaxHighlighter(document), m_base_format(std::move(base_format))
 {
   QPalette base_scheme;
   m_theme_idx = dark_scheme ? 1 : 0;